Maize plants are more sensitive to herbicides , improper selection, and easy to cause phytotoxicity. The types and methods of use of herbicides that can be used in corn fields are as follows: Soil treatment before sowing 40% Ethylhydrazine Suspension Emulsion This herbicide not only has a wide herbicidal spectrum, but also has high herbicidal activity and long service life, and is safe for corn and crops. Before the corn sowing, or before the corn seedling weed 3 leaf stage, 40% acetaminophen suspension (150-400 ml for spring corn, 150-200 ml for summer corn) plus 40 kg of water can be sprayed per acre. grass. After one dose, it can basically ensure that the whole growth period of corn is not affected by weeds. 33% weeding emulsifiable concentrate (Shi Tianbu) is mainly used to control grass weeds, and it also has certain control effect on some dicotyledonous weeds. In the seedlings after corn sowing, use 150-200 ml of liquid per acre to add 40-50 kg of water and spray evenly. If the corn has emerged, it should be applied before weed 2 leaves. 72% dur emulsifiable concentrate This drug is a selective pre-emergence soil treatment agent. Before the seeding of the corn, add 80-50 kg of water per acre with 40-120 ml of liquid and spray evenly. The amount of sand used is lower, and the amount of clay soil is higher. Weed stem and leaf spray treatment After 3-5 leaves of weeds and 2-4 stages of weeds, use 50% Hebao emulsifiable concentrate 100 ml or 4% Yu Nongle 80-100 ml per acre, and spray 40-50 kg of water evenly on weed stems and leaves. . In the corn field where the broadleaf weeds occur severely, it can be sprayed on the weed stems and leaves evenly with 50% of the emulsifiable concentrate 50-60 ml and 40-50 kg of water in the 4-6 leaf stage of the corn. Plastic film covering corn field weed control Use 50% Hebao emulsifiable concentrate 50-70 ml or 72% dul emulsifiable concentrate 40-50 ml or 50% acetochlor EC 50-70 ml or 33% emulsifiable concentrate 100-150 ml per acre, add water after corn sowing 40 -50 kg, spray evenly on the topsoil, then cover the soil.
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